Method and apparatus for encoding and decoding high frequency signal
First Claim
1. An apparatus for encoding a high band signal, the apparatus comprising:
- a processor configured;
to extract a coefficient from linear prediction of a high band signal, and to encode the extracted coefficient;
to generate a signal based on a low band signal and the extracted coefficient; and
to obtain a gain from an energy value of the high band signal and an energy value of the generated signal and to encode the gain; and
an output unit configured to transmit the encoded coefficient and the encoded gain to a decoder,wherein the processor is configured to encode the extracted coefficient by performing an interpolation process on the extracted coefficient.
0 Assignments
0 Petitions
Accused Products
Abstract
Provided are a method and apparatus for encoding and decoding a high frequency signal by using a low frequency signal. The high frequency signal can be encoded by extracting a coefficient by linear predicting a high frequency signal, and encoding the coefficient, generating a signal by using the extracted coefficient and a low frequency signal, and encoding the high frequency signal by calculating a ratio between the high frequency signal and an energy value of the generated signal. Also, the high frequency signal can be decoded by decoding a coefficient, which is extracted by linear predicting a high frequency signal, and a low frequency signal, and generating a signal by using the decoded coefficient and the decoded low frequency signal, and adjusting the generated signal by decoding a ratio between the generated signal and an energy value of the high frequency signal.
-
Citations
18 Claims
-
1. An apparatus for encoding a high band signal, the apparatus comprising:
-
a processor configured; to extract a coefficient from linear prediction of a high band signal, and to encode the extracted coefficient; to generate a signal based on a low band signal and the extracted coefficient; and to obtain a gain from an energy value of the high band signal and an energy value of the generated signal and to encode the gain; and an output unit configured to transmit the encoded coefficient and the encoded gain to a decoder, wherein the processor is configured to encode the extracted coefficient by performing an interpolation process on the extracted coefficient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An apparatus for generating a high band signal, the apparatus comprising:
-
a receiving unit configured to receive a bitstream including an encoded coefficient and an encoded gain; and a processor configured to; to decode the encoded coefficient obtained from linear prediction of a high band signal, and an encoded low band signal from the bitstream, and to generate a signal based on the decoded coefficient and the decoded low band signal; to decode the encoded gain corresponding to a ratio between an energy value the generated signal and an energy value of the high band signal from the bitstream; and to adjust the generated signal using the decoded gain and the decoded coefficient, wherein the processor is configured to decode the encoded coefficient in consideration of an interpolation process. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
-
Specification